<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        var myObject = {
            foo: "bar",
            func: function () {
                var self = this;
                console.log(this.foo); // 'bar'
                console.log(self.foo); // 'bar'
                (function () {
                    console.log(this.foo);// undefined
                    console.log(self.foo);// bar
                }());
            }
        };
        myObject.func();
    </script>
</body>

</html>